Improvement in double self-acting gas-check valves



P. KELLER. Double Self-Acting Gas-Check Valve.

N0. 218,677. Patented Aug. 19,1879.

NPEIERS. PHOTO-UTHOGHAFHER, WASHINGTON D C UNITED STATES PATENT OEEIoE.

PETER KELLER, OF CINCINNATI, OHIO.

IMPROVEMENT IN DOUBLE SELF-ACTING GAS-CHECK VALVES.

Specification forming part of Letters Patent No. 218,677, dated August19, 1879; application filed April 28, 1879.

To all whom it mag concern:

Be it known that 1, PETER KELLER, of Gincinnati, in the county ofHamilton and State of Ohio, have invented certain new and usefulImprovements in Double Self-Acting Gas- (Jheck Valves; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters of reference marked thereon, whichform a part of this specification. I

Figure 1 represents an elevation of my gasregulator. Fig. 2 represents avertical section through X X, Fig. 5. Fig. 3 represents the lower partof the gas-regulator with the screwcap removed, showing the offset andthe projections thereon. Fig. 4 represents an inverted view of the upperpart of the gas-regulator, showing the offset and the projectionsthereon.

Fig. 5 represents aninverted view of the lower part, showing the screwcap. Fig. 6 represents an elevation of one of the conical caps. Fig. 7represents a part vertical section of the lower part of thegas-regulator, taken through V V, Fig. 3. Fig. 8 represents a view inperspective, the regulator being inverted, of the interior of onesection of the gas-check casing, showing the construction andarrangements of one set of blocks for arresting the upward mo tion ofone of the thimble-caps, yet allowing the escape of gas upward aroundthe same.

This invention relates to certain improvements on that class ofgas-regulators for which a patent was granted to me bearing the number137 ,454.

My improved gas check, hereinafter described, is constructed in twopart-s,which screw together, making an air-tight joint. The lower part,A, is provided with an internal annular flange or ofi'set, G having atintervals downwardly-extending lugs or blocks FF F Said part A is alsoscrew-threaded internally to receive an externally screw-threadedthimble or nipple, D This thimble is open at the top, but receives aconical cap, E, which is free to rise and fall over said nipple. The gasenters said thimble D from below, and in the effort to pass out raisessaid cap E until it comes in contact with said offset or flange G whichprevents said cap from ascending too far.

Blocks or lugs F F F against which the cap is pressed, leave spacebetween them for the gas to pass into the upper part or section, B, ofmy double check. This upper part, B, has a thimble or nipple, Dcorresponding to thimble D, a cap, E corresponding to cap E, a flange oroffset, G corresponding to ofl'set G and lugs or blocks F F F,corresponding to F F F The action of the gas and of the several devicesnamed is the same in the upper section, B, of the check as in the lowersection, A.

The bottom, 0, of lower thimble, D is provided with openings K K for theadmission of gas.

, The raised position of the caps is shown in .dotted lines on thedrawings.

The conical tops of the caps E E insure their rising perpendicularly.

Whenever more gas is admitted to the space above the check than theburners can consume, the downward pressure of this superfluous supply ofgas will force down the caps E E and thus out OK the flow of gas untilthe surplus is sufficiently reduced by the burners.

I am aware that it is not new to combine a sliding thimble with an outercasing having tapering plates and alternate recesses on its inside forthe same general purpose as my invention, and I do not claim theabove-described construction; but

What I do claim, and desire to secure by Letters Patent, is

The combination, with thimble D having conical cap E, of tube-section A,provided with an annular oifset, G having blocks F F F, arrangedsubstantially as set forth, so that their flat downward ends will engagethe flattened peripheral part of cap E leaving space for the upwardpassage of gas between said blocks.

In testimony that I claim the foregoing I have hereunto set my hand this23d day of April, 1879.

PETER KELLER.

Witnesses:

W. A. LATTER, C. W. HURDLE.

